package com.day23.ex02;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

public class ComparatorDemo {
    public static void main(String[] args) {

        ArrayList<String> array = new ArrayList<String>();
        array.add("cccc");
        array.add("aa");
        array.add("b");
        array.add("ddd");
        System.out.println("排序前：" + array);
        Collections.sort(array, getComparator());
        System.out.println("排序后：" + array);

    }

    private static Comparator<String> getComparator() {
        return (s1, s2) -> s1.length() - s2.length();
    }
}

